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【单选题】
下列对“禽流感”的定义，准确的一项是（ ）。A.
禽流感是人类在直接接触受H5N1病毒感染的家禽及其粪便或直接接触H5N1病毒后受到感染的一种传染病
B.
禽流感是由A型流感病毒引起禽类的一种从呼吸系统到严重全身败血症等多种症状的传染病
C.
禽流感是能同时给禽类和人类造成大量死亡的流行性感冒传染病
D.
禽流感是禽类的病毒性流行性感冒
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反馈参考答案：
举一反三
【单选题】在8086最小模式下，执行“INAL，n”指令时，M/IO#、WR#、RD#的信号电平依次为（）。
A.
0、0、l
B.
0、三态、0
C.
0、1、0
D.
l、l、0
【简答题】Tan δ = ∞ ,表示材料为理想( ),能力全用于流动损耗。
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